Experimental and numerical studies on fuel-film combustion and wall thermal effect of diesel spray

Role of Altitude in Influencing the Spray Combustion Characteristics of a Heavy-Duty Diesel Engine in a Constant Volume Combustion Chamber. Part II: Impinging Diesel Jet

“…As previously reported by Edwards et al., the effect of impingement involves at least three components: fluid mechanics, thermal effects, and chemical effects. This kind of complexity introduces various unexpected uncertainties to the impingement, making the fundamental research for the wall impingement to remain as an active topic nowadays. ,− Nevertheless, complete agreement on the impact of the wall impingement has not yet been reached, some researchers argue that wall impingement facilitates spray combustion and emissions, ,− while others came to opposite conclusions. − Some researchers devoted to interpret these contradictory conclusions, , and one potential explanation depends on whether the wall impingement is SWI or JWI. Wang et al reported that their configuration corresponded to SWI in the case of conventional nozzles, and hence the liquid wetting effect leads to deteriorated soot formation, while the work of both Xuan et al, and Pickett and López focused on the JWI cases, showing lower soot level of the impinging spray flame.…”

“…This kind of complexity introduces various unexpected uncertainties to the impingement, making the fundamental research for the wall impingement to remain as an active topic nowadays. 19 , 25 − 27 Nevertheless, complete agreement on the impact of the wall impingement has not yet been reached, some researchers argue that wall impingement facilitates spray combustion and emissions, 23 , 28 − 30 while others came to opposite conclusions. 31 − 34 Some researchers devoted to interpret these contradictory conclusions, 35 , 36 and one potential explanation depends on whether the wall impingement is SWI or JWI.…”